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Method and apparatus for attenuation wind noise in seismic data

a technology of wind noise and seismic data, applied in the field of seismic data acquisition and processing, can solve the problems of data degraded by broadband noise, hardly able to be removed in processing, and pseudo-random noise in seismic data

Inactive Publication Date: 2009-11-10
WESTERNGECO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wind is a common phenomenon with seismic surveys leaving the data degraded with broadband noise.
The internal coherence of the wind noise is therefore destroyed, leaving a pseudo-random noise in the seismic data, which hardly can be removed in processing.
More technically, the correlation is performed by a convolution between the survey signal and the resultant seismic data, and the wind noise cannot then be retrieved through deconvolution.
These wind induced, locally coherent, surface waves represent a substantial fraction of wind noise and can not be avoided by burying the geophone.
The correlation with the pilot sweep, however, has a significant impact on the wind noise.
Since wind noise and seismic signal are not correlated, the local phase and amplitude consistency of the wind noise is destroyed.
This implies that all wind noise filtering will result in degradation of the seismic signal.

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  • Method and apparatus for attenuation wind noise in seismic data
  • Method and apparatus for attenuation wind noise in seismic data
  • Method and apparatus for attenuation wind noise in seismic data

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Embodiment Construction

[0022]Illustrative embodiments of the invention are described below. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort, even if complex and time-consuming, would be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0023]FIG. 1 illustrates a land-based seismic survey employing a seismic survey system 100 by which seismic data may be acquired for processing in accordance with the present invention. The seismic survey system 100 includes a seismic recording array 105 and may be constructed in accordance with ...

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Abstract

A method and apparatus for use in seismic prospecting are disclosed. The method includes: attenuating coherent noise in a seismic data set generated from a sweep signal; and correlating the coherent noise-attenuated seismic data set to the sweep signal. The apparatus includes a program storage medium encoded with instructions that, when executed by a computing device perform the method and a computer programmed to perform the method.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention pertains to seismic data acquisition and processing, and, more particularly, to a method and apparatus for attenuating wind noise in seismic data.[0003]2. Description of the Related Art[0004]In a seismic survey, an acoustic or other seismic signal is imparted into a subterranean geological formation. As the signal propagates through the formation, it is reflected back to the surface. Seismic sensors (e.g., geophones, in a land survey) are positioned on the surface to receive the reflections. The reflections are received and converted to data representative of the formation's characteristics and structure. The data is then analyzed to detect the presence of hydrocarbons or other fluids and minerals of interest. Because the cost of extracting such deposits is high, accurate data yielding correct results is highly desired.[0005]Seismic surveys are typically performed in uncontrolled environments. Wind...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01V1/36
CPCG01V1/364G01V2210/3246G01V1/36G01V1/375
Inventor LAAKE, ANDREAS W.
Owner WESTERNGECO LLC